Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6a5e326b2da30a6b4c32b698e74cc626d4090403e5a46f4446a8eb66864e2544' 
  AND token = 'rdjVevcQT7FAxht7ftR7XDn/7Qs3Meu5gcBRpZBL5Xo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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