Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '425b7f2468799291e1adbeba03c2931101cd1802b7ae446e8fe5a7882bdf3112' 
  AND token = 'BMLrcBGQNctg3A9PuHv3fEU6G+Mw/JK8DIfI1Z0Jax0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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