Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa8f19097f9f0c307f1e7aa6cc901e04a5a14a2b3027a6d085c179da93eaf1a9' 
  AND token = 'N38Nyu2uZKg/76uBKAQG2yBLp3M6FPh5C/Kr3oPKj7w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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