Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '768aa75f2e7106fa4f0764b8bff8a6cabe714114e44ca0379d6075d7bbf0ce3e' 
  AND token = 'UKw2Zktvq9feu7se0KiLUNE3OqcxBzkxypTXCoHhG/I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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