SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '45ed720cbe3e2cb67ce51d1a85c190395ac5fb575399468099ca106d1180a087' 
  AND token = '+h4qgmntxQJH91TvkmxUf2VtCa5El0ZwJRIQeGAZ1L8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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