SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7fdeff6b1d242dc9a2fc5cabf96f73594b3a077715c295e6a31758ab4bb8f105' 
  AND token = '2IQ4d0ARbM+mBjyfsJeFVYTikHKw6GjCPDpV2dxx3nI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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