Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c088df85a9da9685b152e0b97c28c15cb20ef2468a8ca3a917480eff81f6e1b6' 
  AND token = 'UY7IDAz/QuUqjetDRgEYVIU4nHlSmC2xGI7oPeAnQdY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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