Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c8b270cbab0bc0594504e2466f88de6ef206627c7d8a3c74ebe8119c3a54cbd9' 
  AND token = 'JUuaZgJ1CiUKTMs2/g1PgVY68JqKmQ+l16trq4Haoig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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