Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3256c63c296e97c49741f963ea8fda0e532e5125804c0fcbcb505053371467c2' 
  AND token = 'piAfKLWB+Iv2ZiZO9OsxSiU//eYl5Nioxcp0qy9vWwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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