Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3423aaf3df965edb85015439143bfedd40c88fd316fbf5e3f8aad9c74fe3fc1' 
  AND token = '8hedb1JBW+uu0KucTqOE/wDIpXLo3VAKsTcA/RxSOOM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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