Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ed696173ae1df50f015e978bcc9a3f449d073b18812eacb2b958128c700d48e' 
  AND token = 'Lx6oPDOxvwc1GSTcxoJbsTIhZosvbfD2sG77V+cKM6s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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