Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8bd86c92f7b60b2c09fc5edb8f745884d521efb46e42c7b387b1b7c64c8f1045' 
  AND token = 'c6FkmUL1648L0PkK6Pvjvc+DqxQPh19LtZQQzg0c6ys=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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