Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c94fe98507319cc4de977c20d005ebd8595d261d8cff8445ce20ffe5648aeeaa' 
  AND token = 'TrvbA2HFSIu5Th0BKZnG19BLbEDUV3aw8jxH2QbbONw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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