Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '22ea23869a9ac27430dcedda5c09e31c53bd21978fbb075797163b1761b44d33' 
  AND token = 'FBma7r0dqbVrn9bMqyDMD3OupEjhsk19rHuzbayqe0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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