Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abd9e3da7c56932d2f65abb3a862e57de963807a58ea9f3da52f1c95f8fd63f3' 
  AND token = 'V8A2eSnj0ErWXEdSwycluIkXW5fpYEsS+C2Cxo5Hqjo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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