Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9524baf15a750a1e023c276941fd0e013a35406e84b21d26b3f05d5386d36b61' 
  AND token = '9CSriQ6BSutu8r6jidASNkYmVUvWjJNKNVfko1/3CEI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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