Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb53615d8d90cb6e569a4ef8ab53c5bf2aac732d9acde28a8d1ef113fe5524b0' 
  AND token = 'fFvo1Xvz+bk333xoFK150jD3DNBllrzQ1sZEU3TtBec=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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