Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4da145f63be1736aff8d020b235b0e0842c5a02754a83f5eac3c4fffbc360bec' 
  AND token = 'JEeQHFOw3Hpq5JDs1875oTqtlZp72LCapcQXAAAEmzk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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