Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'ae435b29f7c806d4ed2471465af1a37c742914ce664be659b6a8a39eac166a28' 
  AND token = 'pdqrHL5GHroTYqGzkTmnkB58X5hogi7pM9004TPfWd8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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