Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '25a68d6918e9a63200386d4d45f30958043cff249785a30b74c315a3b6227393' 
  AND token = 'BscGW4qME/TD+3H3cvy4pe2Ee3NCmtcvJzirkiGJmgs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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