SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '317658895c6be74cf3a673e062d2b642ea0f5f9478235a7771f7ea3eb0399be4' 
  AND token = 'ESyFHLwFgq5Yss0FS+toGjOXFjIAVBrgf7ihKPyOIuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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