Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '832cc22c24f5dd2a5480fc09a941c8b6dec9b62d4ba9c92e5e1202ed8e4cc9ea' 
  AND token = 'VDrCvbdYbqVsIiy28s7lapIhKsT7JCP71ZaP6aumqmQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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