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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5d007e879a24557b2febd5e339856581f663bad9f5c019d5c16e1fc06af2a66' 
  AND token = 'In21JkbwKU7sTxpLqn63P4MmGxn3gkak0biHLf8R3hE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}