Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3aaf8b66cfe2f8fe4ed61af91ff3d183c3f3b35534640d53c99a9dc426835ebb' 
  AND token = 'ShwozKccbqvoQy8wtt9sh9v8cj4DOzpOs7eyWDKS29M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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