Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b094a10531b6ddd18f2acc9e4d44e3688e86f4a85e923d4fedd5c17eb0fe353' 
  AND token = 'sHoXxFOfLbeUcFh+WAxoeIyI42L//lEFACugJ5IeWlw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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