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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0de6669c9a8d8b9157f246a00af5c297685b109a994d9fb79caa5d82fae0c064' 
  AND token = 'WUe68QMpCqCvAnF0XouaQOo2ZzV/pIuLRwZSEthTiJk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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