Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f800e206f86da488dbc76fde22e8f695a2ffd4a598f76cfa204b9670fd2fe81' 
  AND token = 'F+UPgCLMky46E9I3SMXjJcH7o9Bq1eTvp1uS0c6BTyA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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