SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7d8d6d37431d84778b6229c384cb827b43d9113aa2fcea7602d39815cff23616' 
  AND token = 'XH/Cj/TEeCzq6QZW9qaaZywDVE/ZMvWfsZvKTlGCVjU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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