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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '61e534f7b4ddefc0febf805cd4cfb7024cf48d7ceb01d35abe41808169e9158d' 
  AND token = 'AaGCsXdCwbLkMI9ujcErccHHJJ58WODnUeEgr+AEP3Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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