Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e90d3f2def2b59c0aecefc025b9bcf43b6ce73cfeca62d547f581cfb8c990995' 
  AND token = 'YihfdsW9bCwC0+hVJKnUhMf59Kwv5yUWIuk6CTYeiGc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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