Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '03933e6888722665ba5ca1ab308e76a529f28184b8f6587d006deb68e21b8279' 
  AND token = 'Iut6W7k8K32lJWSDz4q2zrgCWVCEgviC9tnHB3Oh+io=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}