Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da338b7af2271a38f49d9d70722bbf768b2dcca4e454b4cbb31c821c031435ab' 
  AND token = '3yvp5YFLQKbEyiVp1V5pypn/BLd50KBj23orsVyCiVE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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