SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06bf0a62c3f44a9d7a665d6c9c779dc1cc70d1d9a0b35ae215c8c808eff97325' 
  AND token = 'UsuYJtLOz9vUk+pL5uWjYDAdG6VnQ+UHx4wBvSjdELM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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