SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '007c58c58e02e9cd889f5db793aaf595b9848aba5dc1bf06b3e2620716a4809c' 
  AND token = 'Wb3IJC2PwKYvn2L/uaJ6L7qV6ABMawF/hRJXB2TMYes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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