Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f55658fb9573804528743cf31a93f3ed1a05fc0b7646d5cf72336954f3f2f5ba' 
  AND token = 'ilvbGuUmY6jcLnvlvCzl6Tvxv6q5vXMYASJ3mUsVI9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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