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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41fcf2cc0e44af35a7a71f689b6ac6701e6c0c4ee712c7042b3ad615ee8a19aa' 
  AND token = 'Xh9rN/JqnMNzgjVaIzbz+UVbPN2Eg53TlKXxlMPq5Vc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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