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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2cf16ddd888271e111e754c5ccbaaa39da133235e5975f5b3133eca598b6ddf5' 
  AND token = '2Y6sPxBBwwG+LH444gaNGmpKa0Uhsl+wYU6UGntse2M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}