Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76ec735a1696b806f6242d4554a5f2eadf8b47b6ad401fc5ee18b3af1d1bbd17' 
  AND token = 'KMwqy6NNG4DH9oKfavh91WFdpr9B8JA3zt4Y2cNGdCA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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