Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2d1fc435f03f847c866a54f6e148fc77392dbbd0f30f891eaf4fbbb6c0036f5' 
  AND token = 'om415DMwShfCLGsbKnV7zcvA9Z8scfi2c8QKXmUH8rk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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