SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1054883ac2c8a1a31160719b19948881cb2074f9b3052c71c60d65937db8c0df' 
  AND token = 'UFKwUp6yODBXsiCU0tKkblISRhwPF68VMfQ1/lqlugw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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