Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2194a04290ed12808d118ae9aea3d91373f26e90fd4e53dfcc15872754f29c24' 
  AND token = '0PGpXk1NC3o+49qXHMoEdVFKsEG915DU2NTPnAECOps=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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