Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1dc2827cb590b1854bc821a662ce89e6eee37236dc7f0225e5fdf9c43796650c' 
  AND token = 'UCabDf1UgMiNfGIT5steM3zwS3XsxYjrdy1aEnGY8VE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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