Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26cd11b3e898d4a2035f1c2d60d53dc7726c20588c2627d9447c14a58f475ea7' 
  AND token = 'r0KMTFR9Ra31b3byAKnI4tpNW3ErKwMgeWy8IPxXJ6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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