Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6deac9d83186231a797d07c8eb1a912218775e1462a1230b2f1d3d5082d01f13' 
  AND token = 'f1J7sYhiA2Ylqdg8nejwP4ki167NclXzOt4Gq34470U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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