Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '1736982f53a8906ae9050e50adf5c683eca54f8afdd2fa8933248717a2f1ba13' 
  AND token = 'kxRSfC9EJwVED2jV7dlkb+4k8yhMECE1XidLjHOpMBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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