Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59f70b3624ba85b6c58e5f4b140e3690ee7d83eda9943f79c29f1579ebd986ef' 
  AND token = 'GdLsAUVcjHHjgFoWgSB13dB4WqyRcm8G6FvZrFfBGVM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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