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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ca43d066eff9c76d5f661022049508349e90e5765dce446930c0315d7b3cfe06' 
  AND token = 'Kv09Pybr07BZFtHMqgp6jqXqrPQch9KyYDqiEqa/2dw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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