Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd71ebc8bbdc2fbced23d04ef5d6822ea1dc2a3d902dcfc4e82b48a1a5f1034c2' 
  AND token = 'viUq9foJSD6pRt2gSrO7e5kesyh0ixo8v4uoq0pAl7o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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