Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '51e053a138ffcc10bc23e830ceaf2434000c12a6418a7a8b6b605486e2f9ad9c' 
  AND token = 'zWtmCViYLfFHS9Ke9Wk7xI5xbFgP7PQlrxl/Hjdpq6Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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