Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2d0f6f43ae86a11fee361020d8e7cd3bb7011f45869b91e8754826f645e8b3cc' 
  AND token = 'u4ig/S0Ci0BDsrKLKG4B4pmZU6FxdwNN547C99oD/LI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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