SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e01bfcd2aa2cfbfe33cd4be0b549224c6f60f970a7088cb53bb52285afa4ec83' 
  AND token = 'XJeg+7sfDlSI3UuSzFMInxsLCu8BTjsymqmvODOT4SY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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