Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '610cae0af01c5fd36efaffa59fbcd0982c7031ef0179f3ba1e13b85126716f1a' 
  AND token = 'XkfnuZ21RJFdwAEu+CidTb3krFJ2EeWwVCuWaTEAtaI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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