Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8eb69bb43f3df5a0e77167a0a6f4e577262e0334a84cbf11c08c83bc53554f9b' 
  AND token = 'ti3VMIvlai75yl2i+/nKzjwRcNVPTrWSXXpGMW38fjs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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