SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8b516b94bc4a8784f71a42794df39256500816866374ffbd91772c96f1f65701' 
  AND token = 'bqnN7f0giOXRBTo16tn+6V0uA7IwmfsQ/bCDJKUZ10E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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