Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '508b622a94d99dbc50c7c4330c00a4682d0c20cc30088918f0929f22bbc5d3dc' 
  AND token = 'R5hHERWDfjs12h8yiOyDcnLHr4OORXPRhYxWRdhrpHE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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