Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a257fd266b81311dfe574d5345dd78b1ecf24ad02f1928ca98478a247a82ea7a' 
  AND token = '7VPScuz6DB8BVUFpRki6xwwC6x1sdBRXIDKgmOTT7rc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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