Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '745d92563a4a6d72bea9967651dcf7caa4237999708f27abc04c08e6e1203e34' 
  AND token = '2blxubhZWTDblLpVLCtaxBN8EvyE4rqdWfb/FsgPlyM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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