Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4271a84ca6bfded8c5768856c6fd886a14e01b708cd81858e2a68a19bd3e125f' 
  AND token = 'OIbkrxnXvtvH4oS7Ul2OqukQ+ThswWU4ZmdW3m+r1dA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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