Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d4b13686bb697cb8d78891bfeebc899089b6914bb1dac7a240b95bf5bda7b12' 
  AND token = 'ZeaewKfVxcU0zHFyZJRamWyjce6/fbKVaW2tDMS5z7A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00073

JSON explain

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