SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4bff195649f6f6334505b39d82c8bd08d899ad687662de528610612753912774' 
  AND token = 'uBo4Pg3GXw1WKovRb6X04/C7FM8GW6bFAKBaR7QcEN4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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