Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a954eec0ba5506b7346a1e786e73e0d05dbe2e387b6a0b50d29b72bf0022b0c4' 
  AND token = 'lOLv9rwiuuIliqHAR0BGuWE1CLkfDPr/S/Zb67Uof98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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