Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5123d0d8d0cae561b618df59c54cd7f580205cc9cf1a71bab1d7e92713da0e4b' 
  AND token = 'odj3LqMoDoFTI83iH6CUWpnJrQbmgY9JqrdTEqhp6Tg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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