Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a573a8585de63885768b9d01e638783352e049c6813ba9b6e9f3f5d26492ed2' 
  AND token = 'jwkO7nQEPh9/UuRM9NiSRU6Ed2x7Ovc5U5hBC57Ifhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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