Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ec6827ff375e1f43e4cd4387e6814eedf6defd1ffcf54f9a247bd8404474263' 
  AND token = 'AV9c4Rg/0m1IykBs1YPf1iF9srMHhoQkKSEqD2VXJ/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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